Spectra of photoneutrons produced by high-energy X-ray radiotherapy linacs.
Spectral fluence of photoneutrons generated in the head of the radiotherapeutic linac Varian 2100 C/D was measured by means of the Bonner spheres spectrometer whose active detector of thermal neutrons was replaced by a track detector, i.e. a sandwich of four CR-39s with the boron radiator inserted between them. Measurements with different collimator settings showed that the fluence of photoneutrons was higher for the more open collimator.
Králík
M
M
Inspectorate for Ionizing Radiation, Czech Metrology Institute, Radiová 1, CZ 102 00 Prague 10, Czech Republic. mkralik@cmi.cz
Turek
K
K
Vondrácek
V
V
D000465:Algorithms; D006801:Humans; D009502:Neutrons; D010315:Particle Accelerators; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D011882:Radiotherapy, High-Energy / Q000295:instrumentation* / Q000379:methods; D013053:Spectrophotometry; D014965:X-Rays